Belgium has some beautiful beaches too and might be slightly easier to get there too. Really really wide and flat beaches with soft white sand. And then of course they have better beer than the French. And they know how to do moules. And don't get me started on the "coffee". I love it there. I recommend checking out Blankenberge.
Considering driving versus Easyjet, you might find flying is both cheaper and less hassle. Alicante is a good airport to fly to. You can actually walk from the airport to the beach (technically you can in Barcelona too, but its much more of a hassle, and that particular bit of beach isn't that nice).
You will have to say what exactly you are looking for. The closest part of the Med is the Italian Riviera... but my wife for example was completely disappointed by it as it isnt sandy. I'd recommend to drive one hour longer to the Cote d'Azur. Nice, Antibes, Cannes...
Ahh, much similar sentiment to what I feel myself every time I go to the lakes here. Don't get me wrong, in the dog days of summer, it really is nice to get into some very chilly water and go for a swim, beach or not.
I suppose that's one of those subjective things, like "love" and "friendship" ... what a beach IS perhaps depends a bit upon what you're used to expressed as being a beach.